wxpython 文件复制进度条

Question

朋友，请帮助我如何在 Windows 中复制文件夹时更新 WX Widgets python 中的进度条。我尝试了很多搜索。 我对 python 很感兴趣，但不是那么专家。只是想从控制台 python 编程切换到 gui 编程。请帮助我。

提前致谢！ 加内什 R

Answer 1

使用ProgressDialog's Update 函数，如果您只需要向用户显示正在发生的事情，请使用UpdatePulse。

pulse_dlg = wx.ProgressDialog(title="Dialog Title", message="Dialog Message", maximum=100)
# Some stuff happens
for i in range(10):
    wx.MilliSleep(250)
    pulse_dlg.Update(10*i)

您还可以允许用户中止操作，请查看主题上的Mike Driscoll's excellent tutorial。

Answer 2

您可以编写自己的 copytree 稍加修改的版本，这会有所帮助：

import shutil
import os.path
import os

def file_copied():
    print "File copied!"

# Usage example:  copytree(src, dst, cb=file_copied)
def copytree(src, dst, symlinks=False, ignore=None, cb=None):
    """Recursively copy a directory tree using copy2().

    The destination directory must not already exist.
    If exception(s) occur, an Error is raised with a list of reasons.

    If the optional symlinks flag is true, symbolic links in the
    source tree result in symbolic links in the destination tree; if
    it is false, the contents of the files pointed to by symbolic
    links are copied.

    The optional ignore argument is a callable. If given, it
    is called with the `src` parameter, which is the directory
    being visited by copytree(), and `names` which is the list of
    `src` contents, as returned by os.listdir():

        callable(src, names) -> ignored_names

    Since copytree() is called recursively, the callable will be
    called once for each directory that is copied. It returns a
    list of names relative to the `src` directory that should
    not be copied.

    XXX Consider this example code rather than the ultimate tool.

    """
    names = os.listdir(src)
    if ignore is not None:
        ignored_names = ignore(src, names)
    else:
        ignored_names = set()

    os.makedirs(dst)
    errors = []
    for name in names:
        if name in ignored_names:
            continue
        srcname = os.path.join(src, name)
        dstname = os.path.join(dst, name)
        try:
            if symlinks and os.path.islink(srcname):
                linkto = os.readlink(srcname)
                os.symlink(linkto, dstname)
            elif os.path.isdir(srcname):
                copytree(srcname, dstname, symlinks, ignore)
            else:
                # Will raise a SpecialFileError for unsupported file types
                shutil.copy2(srcname, dstname)
                if cb is not None:
                    cb()
        # catch the Error from the recursive copytree so that we can
        # continue with other files
        except Error, err:
            errors.extend(err.args[0])
        except EnvironmentError, why:
            errors.append((srcname, dstname, str(why)))
    try:
        shutil.copystat(src, dst)
    except OSError, why:
        if WindowsError is not None and isinstance(why, WindowsError):
            # Copying file access times may fail on Windows
            pass
        else:
            errors.extend((src, dst, str(why)))
    if errors:
        raise Error, errors

所有这些代码与原始复制树的不同之处在于它在复制文件后调用指定的函数。因此，在您的情况下，您可以使用 Update() 对话框代替 file_copied()，或更新成功复制的文件数等。